Transmission control device



May 27, W4? E. A. DERuNGs TRANSMISSION CONTROL DEVICE Filed DeG. 25, 1943 Patented May 27, 1947 STATES -PAT-ENT orrlac Application December 23, 1943, Serial No. 515,407 vIn Switzerland May 24, 1.943

(Cl. 19E-.4335) .5-laims. l

Y@inject -oi the present intention is -a control device.

There are certain machines, specially `machine tools, for instance, lathes which are equipped with speed selectors 'bymeans -of which diiien. ent speeds can loe limparted to the `.main shaft as desired bythe operator. In such selectors which may, e. g., -be of the type described in my application No. 497,376 which has -eventuated in Patent No. 2,388,043, dated October 30, v1945, putting the ychange wheels necessary for the speed changes into place generally done byv mear-1s of' the lever controlling the main coupling, that is the one controlling the coupling of the ma.- chine to the motor. `Al--thouglfi all the means, those for selection as wel-l as those for coupling, or putting the 'change wheels into place respectively', are in proximity with regard' to one another, manipulation errors can take place. 'It-is, for instance, very `importan-i', that, after having chosen a speed, all the vmovements necessary for putting the change vwheelsy into place are executed, even if lanother speed is to be chosen when the manipulation is finished, in case the first speed sh'ould lnot correspond to that which must be' inserted.

Object of the invention is a control device of the above kind, e. g. for a machine tool which is characterised in that. it, .comprises a control set coupled inthe one direction of rotation with the speed selector and in the other direction Y with the coupling.

In this way a manipulation .ci the selector, when the coupling operation has begun, is prevented. Besides this, such a control set can be operated at a distance, e. g. by means oi asteering wheel which Aon a lathe of a certain length, advances with the carriage carrying the. tools, i. e., v`a wheel which is constantly within reach oi the operator.

"Ihe accompanying drawings illustrate by way of examples, two embodiments `of the control device according tothe invention.

Fig. 1 is an axial section through the first, and

Fig. 2r a similar section through the `second embodiment.

To the shaft 30 a wheel 3J provided with notches 32 is keyed-on, carrying, on the one face, a pawl 3l and, on the other face, a pawl 53. These pawls work in different directions; pawl 3l engages ratchet wheel 6 loosely mounted on the shaft 30 and pawl 53 cooperates with ratchet wheel l likewise loosely mounted on the shaft 30.

l'Ill-1e' hub of wheel i :carries a secon-d 3B whose .notches 40 correspond to those 32 .oi the wheel 34 `a, slight angular displace.` ment. A stopping roller 419v pressed against the wheel 38 by aspring `311 and Vmounted on rod 48 slidably arranged on bearings 36 of the framei's `destined to engage these notches All.

A stopping roller L33 mounted `on the -izod 35 likewise siidably disposed 4on 'bearings .33 ci `the frame cooperates with the numbering 'wheel 3d.

The -oi the ratchet wheel T carri-es -a cam $9 with a notch 41|, ya, `roller 42: being mounted on `a rod' :t1 and pressed against the cam .39 'by a spring 34'.

The huh 43 of' the ratchet wheel "l carries also an eccentric M cooperating 'with' a coupling member formed as a rod Mi .connectedtothe nonrepresented main Acoupling leiterI of the machine to be controlled, therefore, 'likewise Ato .the means for putting the change `w-lfieel's in the gear box into place, e. g. as shown in application No. 497,3716.

The hub of the ratchet wheel :6 carries a speed selector member form-ed es a toothed wheelulll in yconnection with the nonerepresentod selecting -cams of o, selector e. g. as described in my application No. 491,376. The shaft 3d of .the illustrated lcontrol set is, by Vmeansl vof non-representedimechanicalmeans, relation toa steering wheel 5l' which may e. g. 'be mounted on `the carriage of a lathe or on the -f-rame -oi the device itself. 'indicator 52 showing the position of vwhee'li'iis fixed tothe sh'af-t of `this steering --wheel 154 rotating in yfront of a non-illustrated fixed pointer, the-graduation of indicator Icor.- responding -to the number of Yspeeds `cbtairrabie with the selector and likewise to the number of notches of wheels 3l? rand 38,

The rods 4l and #8 of thestopping rol-1ers 42. and yl9--a re placed under a rocking member 5o in such -a way that only one of the rollers 42, 49 is allowed by said member to disengage at one and the same time. Thedevice illustrated works as follows:

When the steering wheel 5l is rotated in the clockwise direction, 1the ratchety wheel 6 land the wheel 38 are taken along; 'bythepawl 31 `while the kpawl 53 is moved over the ratchet wheel 'lactually at rest'. Duri-ng this rotation theselecting process takes place. Wh'en the steering wheel 5| is rotated in the anticlockwise direction, the ratchet wheel 1 and the cam 39 are taken along by the pawl 53 while thepawl 31 is moved over the ratchet wheel 6 actually at rest. During a whole revolution of the steering wheel 5| member 59 free Way to oscillate under the influence of rod 4l, i. e. if the roller 49 engages a notch of Wheel 38. On the contrary, a rotation of the selector member 46 is only possible if the Iroller 42 engages the notch 4l corresponding to` ithe engaged state of the machine.

l In the example shown in Fig. 2, totheshaftY 69 a hub 6| is keyed-on, carrying the axles 62 of spider pinions 63 belonging to a diierential gear whose central wheels 64 and 65 are loosely mourltedl on the shaft 60. These wheels 64, 65 are rigidly connected with ratchet wheels 66 and 61 cooperating with pawls 68 and 69 in different directions. Therefore, each of the central wheels 64, 65 can only rotate in one direction. The hub of the wheel 66 carries a wheel 1U Whose notches correspond to the diierent positions of the nonillustrated speed selector which can be operated by the bevel gear 1I. A stopping roller 12, whose rod 'I4 is slidably mounted on bearings 1'5, is pressed into the notches ofthe wheel 'I0 by a spring '13. The hub of the wheel 65 carries a cam 16 having a notch 'Il destined to receive a stopping roller pressed against the cam 16 by a spring T9. The rod 86 of this stopping roller is slidably mounted on the bearings 8l. The hub of the wheel 65 comprises, besides, an eccentric 82 which cooperates with a rod 83 for disengaging and engaging the machine to be controlled.

These operations are carried outby means of a steering wheel 84 placed anywhere on the machine, for instance, on the carriage carrying the tools or on the headstock of a machine tool. Above the rods 14 and 86 of the stopping rollers 12 and 78 is disposed a rocking member 86 whose ends are placed in such a Way that it is impossible for one of the rollers to leave a notch when the other roller isl not in a notch. v From this it results that, as in the preceding embodiment, the

speed selection can only be executed when the stopping roller 'i8 is in the corresponding notch and that disengagement is impossible on a selecting operation during which the roller12 does not engage a notch of the wheel 10. 'Ihe selecting operation once begun, the pinions 63, owing to the pawls 6l, 68 cannot be turned back. The selecting movement must be finished before coupling becomes possible. The selection and coupling are executed by means of a steering wheel 34 by means of which the spider pinions B3 can be rotated, the latter communicating their movement to that of the` wheels 64, 65 which is not locked by its pawl and ratchet wheel.

What I claim is: l

1. In a machine, a coupling control member, a speed selector control member, a member movable in opposite directions, and means operable during the movement of the movable member in one direction for coupling said movable member with said speed selector control member and operable during movement in the other direction for coupling the movable member with said coupling control member, and a locking device preventing manipulation of the speed selector control member during operation of the coupling control member by said movable member.

2. In a machine, a coupling control member, a speed selector control member, a member movable in opposite directions, and means operable during the movement of the movable member in one direction for coupling said movable member with said speed selector control member and operable during movement in the other direction for coupling the movable member With said coupling control member, stop devices, for locking said coupling control member and said speed selector control member, and a rocking member cooperating with said devices for preventing movement of the stop device associated with one of said control members when the other stop de-v vice is not in a predetermined place.

3. In a machine,a coupling control member, a speed -selector control member, a member movable in opposite directions, and means operable during the movement of the movable member in one direction for coupling said movable member with said speed selector control member and operable during movement in the other direction for coupling the movable member with said coupling control member, notched members connected with said control members, stop devices en-4 gageable in the notched members, and a rocking member cooperating With said stop devices for preventingv movement of the stop device associated with the notched member connected with one of said control members, when the other stop device is not in a predetermined place.

4. A machine as claimed in claim 3 wherein said means includes ratchet wheels each connected with one of said notched members.

5. A machine as claimed in claim 3 wherein said means includes spider pinions, and central wheels capable of being rocked in dependence upon the direction of rotation of the spider pinions.

ERNEST ALPHONSE DERUNGS.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS 

